Introduction on Qbasic

Introduction         

      QBasic stands for Quick Beginners All-purpose Symbolic Instruction Code. It's a high-level programming language developed by Microsoft. It is designed to be quick, versatile, and perfect for those new to programming. Imagine it as a language that speaks to your computer in simple sentences. IN 1963 A.D, it was developed by John Kemeny and Thomas Kurtz.

Features of Qbasic:

1. It is a user friendly language.
2. It is widely known and accepted programming language.
3. It is one of the most flexible languages
4. Debugging can be easily done.

Elements of Qbasic:

1. 1. Variables:

   • Used to store and manipulate data during program execution.

2. 2. Keywords:

   • Reserved words with specific meanings in the QBASIC language.

3. 3. Constants:

   • Fixed values that do not change during program execution.

4. 4. Operators:

   • Symbols that perform operations on variables and values.

Characters set:

Character set is a group of valid characteristics and symbols supported by a programming language. QBASIC supports a variety of characters in its character set. Here are the main categories:

1. 1. Alphabets:

   • Uppercase letters: A-Z
   • Lowercase letters: a-z

2. 2. Numbers:

   • 0,1,2,3,4,5,6,7,8,9

3. 3. Special Symbols:

   • ! @ # $ % ^ & * ( ) - + = { } [ ] | \ : ; " ' < > , . ? / _

4. 
   

Operators:

QBASIC supports various operators for performing different operations. It is a symbol which perform logical and arithmetic operations. Here are the main types of operators in QBASIC:

1. Arithmetic operators : +, -, *, / ,

2. Relational operators: =, <, > , <=, <=

3. Logical operators:AND , OR , NOT